Mount Camera Rod on Alpha Grip Stand, Clamps onto 45mm Rigging Rod, 360° Rotation and Up/Down Adjustment, 1/4"-20 and 3/8"-16 Accessory Threads, Locking Clamp Fits 15-50mm Diameter Rod, Durable Aluminum Construction. Mount a camera or accessory rod onto your Alpha Mobile Workstation or Alpha Docking Universal Support Stand with this Camera Mounting Clamps pair from Proaim. The durable aluminum clamps feature crab-style jaws that mount onto your Alpha cart mast with a 15-50mm opening range. The clamps feature a 45mm diameter clamp on the other side to mount your camera/accessory rod.Both clamps can rotate 360? at each end and they can slide up and down for adjustment. Spacing the two clamps along different points on the rods provides added mount stability.